From 36cb537f3cfc2c6e7fa8f457970f7786290f6722 Mon Sep 17 00:00:00 2001
From: Sebastian <mail@fawkes100.de>
Date: Sat, 11 Nov 2023 11:20:48 +0100
Subject: [PATCH] tests (#43)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-authored-by: Sebastian Böckelmann <uqpko@student.kit.edu>
Reviewed-on: https://git.fawkes100.de/Sebastian/TimeManager/pulls/43
---
 .gitea/workflows/demo.yaml                    |  27 ++
 backend/.idea/workspace.xml                   | 268 +++++++++++++++--
 backend/pom.xml                               |  11 +
 .../src/main/java/core/DemoApplication.java   |   4 +-
 .../taskgroup/TaskgroupFieldInfo.java         |   8 +
 .../timemanager/tasks/TaskFieldInfo.java      |  10 +
 backend/src/main/java/core/entities/User.java |  21 ++
 .../java/core/entities/timemanager/Task.java  |  42 ++-
 .../core/entities/timemanager/Taskgroup.java  |  16 +-
 .../timemanager/TaskRepository.java           |   9 +-
 .../java/core/services/ServiceExitCode.java   |   3 +-
 .../main/java/core/services/TaskService.java  |  32 +-
 .../java/core/services/TaskgroupService.java  |   4 -
 .../test/java/core/DemoApplicationTests.java  |   6 +-
 .../taskgroups/TaskgroupRepsitoryTest.java    | 112 +++++++
 .../core/taskgroups/TaskgroupServiceTest.java | 202 +++++++++++++
 .../java/core/tasks/TaskRepositoryTest.java   | 160 ++++++++++
 .../test/java/core/tasks/TaskServiceTest.java | 278 ++++++++++++++++++
 .../java/core/users/UserRepositoryTests.java  |  87 ++++++
 .../src/test/resources/application.properties |  13 +
 .../test/resources/taskRepositoryEntries.sql  |  19 ++
 .../taskgroupRepositoryTestEntries.sql        |  12 +
 .../resources/userRepisotoryTestEntries.sql   |   2 +
 23 files changed, 1284 insertions(+), 62 deletions(-)
 create mode 100644 .gitea/workflows/demo.yaml
 create mode 100644 backend/src/test/java/core/taskgroups/TaskgroupRepsitoryTest.java
 create mode 100644 backend/src/test/java/core/taskgroups/TaskgroupServiceTest.java
 create mode 100644 backend/src/test/java/core/tasks/TaskRepositoryTest.java
 create mode 100644 backend/src/test/java/core/tasks/TaskServiceTest.java
 create mode 100644 backend/src/test/java/core/users/UserRepositoryTests.java
 create mode 100644 backend/src/test/resources/application.properties
 create mode 100644 backend/src/test/resources/taskRepositoryEntries.sql
 create mode 100644 backend/src/test/resources/taskgroupRepositoryTestEntries.sql
 create mode 100644 backend/src/test/resources/userRepisotoryTestEntries.sql

diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
new file mode 100644
index 0000000..21b19b8
--- /dev/null
+++ b/.gitea/workflows/demo.yaml
@@ -0,0 +1,27 @@
+name: Java CI with Maven
+run-name: ${{ gitea.actor }} is testing out Gitea Actions 🚀
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up JDK 17
+      uses: actions/setup-java@v3
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+        cache: maven
+    - name: Set up Maven
+      uses: stCarolas/setup-maven@v4.5
+      with:
+        maven-version: 3.8.2
+    - name: Build with Maven
+      run: mvn -B package --file backend/pom.xml
+
+    # Optional: Uploads the full dependency graph to GitHub to improve the quality of Dependabot alerts this repository can receive
+   # - name: Update dependency graph
+      #uses: advanced-security/maven-dependency-submission-action@571e99aab1055c2e71a1e2309b9691de18d6b7d6
\ No newline at end of file
diff --git a/backend/.idea/workspace.xml b/backend/.idea/workspace.xml
index f7c95af..fc7a90a 100644
--- a/backend/.idea/workspace.xml
+++ b/backend/.idea/workspace.xml
@@ -4,13 +4,9 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="3a869f59-290a-4ab2-b036-a878ce801bc4" name="Changes" comment="Fix marking finished task as overdue">
+    <list default="true" id="3a869f59-290a-4ab2-b036-a878ce801bc4" name="Changes" comment="Remove entityManager from TaskService">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/core/repositories/timemanager/TaskRepository.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/core/repositories/timemanager/TaskRepository.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/core/services/TaskService.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/core/services/TaskService.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/../frontend/src/app/app-routing.module.ts" beforeDir="false" afterPath="$PROJECT_DIR$/../frontend/src/app/app-routing.module.ts" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/../frontend/src/app/app.component.html" beforeDir="false" afterPath="$PROJECT_DIR$/../frontend/src/app/app.component.html" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/../frontend/src/app/app.module.ts" beforeDir="false" afterPath="$PROJECT_DIR$/../frontend/src/app/app.module.ts" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/test/java/core/tasks/TaskServiceTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/core/tasks/TaskServiceTest.java" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -29,7 +25,7 @@
   <component name="Git.Settings">
     <option name="RECENT_BRANCH_BY_REPOSITORY">
       <map>
-        <entry key="$PROJECT_DIR$/.." value="master" />
+        <entry key="$PROJECT_DIR$/.." value="test-failing" />
       </map>
     </option>
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/.." />
@@ -56,9 +52,10 @@
     &quot;RunOnceActivity.ShowReadmeOnStart&quot;: &quot;true&quot;,
     &quot;WebServerToolWindowFactoryState&quot;: &quot;false&quot;,
     &quot;extract.method.default.visibility&quot;: &quot;private&quot;,
-    &quot;git-widget-placeholder&quot;: &quot;issue-11-angular-update&quot;,
+    &quot;git-widget-placeholder&quot;: &quot;tests&quot;,
+    &quot;ignore.virus.scanning.warn.message&quot;: &quot;true&quot;,
     &quot;last_directory_selection&quot;: &quot;D:/Programmierprojekte/TimeManager/backend/src/main/java/core/api/models/timemanager&quot;,
-    &quot;last_opened_file_path&quot;: &quot;D:/Programmierprojekte/Dicewars/client&quot;,
+    &quot;last_opened_file_path&quot;: &quot;/media/sebastian/Data2/Programmierprojekte/Storycreator&quot;,
     &quot;node.js.detected.package.eslint&quot;: &quot;true&quot;,
     &quot;node.js.detected.package.tslint&quot;: &quot;true&quot;,
     &quot;node.js.selected.package.eslint&quot;: &quot;(autodetect)&quot;,
@@ -70,11 +67,104 @@
   },
   &quot;keyToStringList&quot;: {
     &quot;DatabaseDriversLRU&quot;: [
+      &quot;h2&quot;,
       &quot;mariadb&quot;
     ]
   }
 }</component>
-  <component name="RunManager">
+  <component name="RecentsManager">
+    <key name="CreateClassDialog.RecentsKey">
+      <recent name="core.taskgroups" />
+    </key>
+    <key name="CopyFile.RECENT_KEYS">
+      <recent name="$PROJECT_DIR$/src/main/resources" />
+      <recent name="$PROJECT_DIR$/src/test/resources/core/taskgroups" />
+    </key>
+    <key name="MoveFile.RECENT_KEYS">
+      <recent name="$PROJECT_DIR$/src/test/resources" />
+      <recent name="$PROJECT_DIR$/src/test/java/core/taskgroups" />
+    </key>
+  </component>
+  <component name="RunManager" selected="JUnit.TaskServiceTest">
+    <configuration name="TaskServiceTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="demo" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="core.tasks.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="core.tasks" />
+      <option name="MAIN_CLASS_NAME" value="core.tasks.TaskServiceTest" />
+      <option name="TEST_OBJECT" value="class" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="TaskServiceTest.clearTasks" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="demo" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="core.tasks.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="core.tasks" />
+      <option name="MAIN_CLASS_NAME" value="core.tasks.TaskServiceTest" />
+      <option name="METHOD_NAME" value="clearTasks" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="TaskServiceTest.deleteTask" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="demo" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="core.tasks.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="core.tasks" />
+      <option name="MAIN_CLASS_NAME" value="core.tasks.TaskServiceTest" />
+      <option name="METHOD_NAME" value="deleteTask" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="TaskServiceTest.finishTask" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="demo" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="core.tasks.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="core.tasks" />
+      <option name="MAIN_CLASS_NAME" value="core.tasks.TaskServiceTest" />
+      <option name="METHOD_NAME" value="finishTask" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="TaskServiceTest.loadAllTasks" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="demo" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="core.tasks.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="core.tasks" />
+      <option name="MAIN_CLASS_NAME" value="core.tasks.TaskServiceTest" />
+      <option name="METHOD_NAME" value="loadAllTasks" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
     <configuration name="DemoApplication" type="SpringBootApplicationConfigurationType" factoryName="Spring Boot" nameIsGenerated="true">
       <module name="demo" />
       <option name="SPRING_BOOT_MAIN_CLASS" value="core.DemoApplication" />
@@ -82,6 +172,15 @@
         <option name="Make" enabled="true" />
       </method>
     </configuration>
+    <recent_temporary>
+      <list>
+        <item itemvalue="JUnit.TaskServiceTest" />
+        <item itemvalue="JUnit.TaskServiceTest.loadAllTasks" />
+        <item itemvalue="JUnit.TaskServiceTest.finishTask" />
+        <item itemvalue="JUnit.TaskServiceTest.clearTasks" />
+        <item itemvalue="JUnit.TaskServiceTest.deleteTask" />
+      </list>
+    </recent_temporary>
   </component>
   <component name="SpellCheckerSettings" RuntimeDictionaries="0" Folders="0" CustomDictionaries="0" DefaultDictionary="application-level" UseSingleDictionary="true" transferred="true" />
   <component name="TaskManager">
@@ -111,6 +210,13 @@
       <workItem from="1698499063683" duration="8312000" />
       <workItem from="1698557538577" duration="18000" />
       <workItem from="1698557567325" duration="1724000" />
+      <workItem from="1699205483652" duration="3298000" />
+      <workItem from="1699380499473" duration="2708000" />
+      <workItem from="1699460935890" duration="5000" />
+      <workItem from="1699466564154" duration="6646000" />
+      <workItem from="1699473376129" duration="1423000" />
+      <workItem from="1699639316405" duration="9267000" />
+      <workItem from="1699684493731" duration="1121000" />
     </task>
     <task id="LOCAL-00001" summary="Structure Taskgroups in Hierarchies">
       <option name="closed" value="true" />
@@ -272,23 +378,117 @@
       <option name="project" value="LOCAL" />
       <updated>1698592265846</updated>
     </task>
-    <option name="localTasksCounter" value="21" />
+    <task id="LOCAL-00021" summary="Write simple Testcase for ci/cd">
+      <option name="closed" value="true" />
+      <created>1699207483922</created>
+      <option name="number" value="00021" />
+      <option name="presentableId" value="LOCAL-00021" />
+      <option name="project" value="LOCAL" />
+      <updated>1699207483922</updated>
+    </task>
+    <task id="LOCAL-00022" summary="Deactivate Overall System test (temporarly)">
+      <option name="closed" value="true" />
+      <created>1699207725882</created>
+      <option name="number" value="00022" />
+      <option name="presentableId" value="LOCAL-00022" />
+      <option name="project" value="LOCAL" />
+      <updated>1699207725883</updated>
+    </task>
+    <task id="LOCAL-00023" summary="Fix failing test case">
+      <option name="closed" value="true" />
+      <created>1699380549911</created>
+      <option name="number" value="00023" />
+      <option name="presentableId" value="LOCAL-00023" />
+      <option name="project" value="LOCAL" />
+      <updated>1699380549911</updated>
+    </task>
+    <task id="LOCAL-00024" summary="TaskgroupRepsitoryTest">
+      <option name="closed" value="true" />
+      <created>1699470020407</created>
+      <option name="number" value="00024" />
+      <option name="presentableId" value="LOCAL-00024" />
+      <option name="project" value="LOCAL" />
+      <updated>1699470020407</updated>
+    </task>
+    <task id="LOCAL-00025" summary="TaskgroupRepsitoryTest (+Delete)">
+      <option name="closed" value="true" />
+      <created>1699471078386</created>
+      <option name="number" value="00025" />
+      <option name="presentableId" value="LOCAL-00025" />
+      <option name="project" value="LOCAL" />
+      <updated>1699471078386</updated>
+    </task>
+    <task id="LOCAL-00026" summary="FindAlltasksByUser Test">
+      <option name="closed" value="true" />
+      <created>1699474949938</created>
+      <option name="number" value="00026" />
+      <option name="presentableId" value="LOCAL-00026" />
+      <option name="project" value="LOCAL" />
+      <updated>1699474949938</updated>
+    </task>
+    <task id="LOCAL-00027" summary="Test TaskRepository">
+      <option name="closed" value="true" />
+      <created>1699641346158</created>
+      <option name="number" value="00027" />
+      <option name="presentableId" value="LOCAL-00027" />
+      <option name="project" value="LOCAL" />
+      <updated>1699641346158</updated>
+    </task>
+    <task id="LOCAL-00028" summary="Initialize Testing of Testservice">
+      <option name="closed" value="true" />
+      <created>1699645467388</created>
+      <option name="number" value="00028" />
+      <option name="presentableId" value="LOCAL-00028" />
+      <option name="project" value="LOCAL" />
+      <updated>1699645467388</updated>
+    </task>
+    <task id="LOCAL-00029" summary="Use @Sql instead of persit()">
+      <option name="closed" value="true" />
+      <created>1699646291964</created>
+      <option name="number" value="00029" />
+      <option name="presentableId" value="LOCAL-00029" />
+      <option name="project" value="LOCAL" />
+      <updated>1699646291964</updated>
+    </task>
+    <task id="LOCAL-00030" summary="Resolve Merge-Conflict">
+      <option name="closed" value="true" />
+      <created>1699693472182</created>
+      <option name="number" value="00030" />
+      <option name="presentableId" value="LOCAL-00030" />
+      <option name="project" value="LOCAL" />
+      <updated>1699693472182</updated>
+    </task>
+    <task id="LOCAL-00031" summary="Deleting Task test">
+      <option name="closed" value="true" />
+      <created>1699694400508</created>
+      <option name="number" value="00031" />
+      <option name="presentableId" value="LOCAL-00031" />
+      <option name="project" value="LOCAL" />
+      <updated>1699694400508</updated>
+    </task>
+    <task id="LOCAL-00032" summary="Consider increased number of tasks">
+      <option name="closed" value="true" />
+      <created>1699694552466</created>
+      <option name="number" value="00032" />
+      <option name="presentableId" value="LOCAL-00032" />
+      <option name="project" value="LOCAL" />
+      <updated>1699694552466</updated>
+    </task>
+    <task id="LOCAL-00033" summary="Remove entityManager from TaskService">
+      <option name="closed" value="true" />
+      <created>1699695051881</created>
+      <option name="number" value="00033" />
+      <option name="presentableId" value="LOCAL-00033" />
+      <option name="project" value="LOCAL" />
+      <updated>1699695051881</updated>
+    </task>
+    <option name="localTasksCounter" value="34" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
     <option name="version" value="3" />
   </component>
   <component name="VcsManagerConfiguration">
-    <MESSAGE value="Structure Taskgroups in Hierarchies" />
-    <MESSAGE value="Update gitignore for idea folder" />
-    <MESSAGE value="Datastructure for Tasks" />
-    <MESSAGE value="Implementing edit route for tasks" />
-    <MESSAGE value="Delete and clear Tasks" />
-    <MESSAGE value="Delete and clear Tasks (Frontend)" />
-    <MESSAGE value="Define Entity BasicTaskSchedule and Taskcontroller" />
-    <MESSAGE value="Delete Schedules" />
-    <MESSAGE value="Deliver Schedule Path Info when fetching Schedules" />
-    <MESSAGE value="Removed unused TaskgroupShortInfo.java" />
     <MESSAGE value="Fix Foreign Key Constraint Fail when deleting Taskgroups" />
     <MESSAGE value="Stop and Finish TaskSchedules" />
     <MESSAGE value="Include TaskScheduleStopResponse" />
@@ -300,16 +500,25 @@
     <MESSAGE value="List missed Schedules" />
     <MESSAGE value="Forget single schedule" />
     <MESSAGE value="Fix marking finished task as overdue" />
-    <option name="LAST_COMMIT_MESSAGE" value="Fix marking finished task as overdue" />
+    <MESSAGE value="Write simple Testcase for ci/cd" />
+    <MESSAGE value="Deactivate Overall System test (temporarly)" />
+    <MESSAGE value="Fix failing test case" />
+    <MESSAGE value="TaskgroupRepsitoryTest" />
+    <MESSAGE value="TaskgroupRepsitoryTest (+Delete)" />
+    <MESSAGE value="FindAlltasksByUser Test" />
+    <MESSAGE value="Test TaskRepository" />
+    <MESSAGE value="Initialize Testing of Testservice" />
+    <MESSAGE value="Use @Sql instead of persit()" />
+    <MESSAGE value="Make the Test Transactional" />
+    <MESSAGE value="Resolve Merge-Conflict" />
+    <MESSAGE value="Deleting Task test" />
+    <MESSAGE value="Consider increased number of tasks" />
+    <MESSAGE value="Remove entityManager from TaskService" />
+    <option name="LAST_COMMIT_MESSAGE" value="Remove entityManager from TaskService" />
   </component>
   <component name="XDebuggerManager">
     <breakpoint-manager>
       <breakpoints>
-        <line-breakpoint enabled="true" type="java-line">
-          <url>file://$PROJECT_DIR$/src/main/java/core/services/TaskgroupService.java</url>
-          <line>52</line>
-          <option name="timeStamp" value="1" />
-        </line-breakpoint>
         <line-breakpoint enabled="true" type="java-line">
           <url>file://$PROJECT_DIR$/src/main/java/core/services/TaskScheduleService.java</url>
           <line>87</line>
@@ -325,6 +534,11 @@
           <line>202</line>
           <option name="timeStamp" value="10" />
         </line-breakpoint>
+        <line-breakpoint enabled="true" type="java-line">
+          <url>file://$PROJECT_DIR$/src/main/java/core/entities/User.java</url>
+          <line>57</line>
+          <option name="timeStamp" value="12" />
+        </line-breakpoint>
       </breakpoints>
     </breakpoint-manager>
   </component>
diff --git a/backend/pom.xml b/backend/pom.xml
index 2073f15..18787b6 100644
--- a/backend/pom.xml
+++ b/backend/pom.xml
@@ -54,6 +54,17 @@
 			<artifactId>jjwt</artifactId>
 			<version>0.9.1</version>
 		</dependency>
+		<dependency>
+			<groupId>com.h2database</groupId>
+			<artifactId>h2</artifactId>
+			<version>2.2.224</version>
+			<scope>test</scope>
+		</dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
 	<build>
diff --git a/backend/src/main/java/core/DemoApplication.java b/backend/src/main/java/core/DemoApplication.java
index 4ace39f..ab593cb 100644
--- a/backend/src/main/java/core/DemoApplication.java
+++ b/backend/src/main/java/core/DemoApplication.java
@@ -18,7 +18,7 @@ public class DemoApplication{
 	}
 
 
-	@Bean
+	/*@Bean
 	public CommandLineRunner init(RoleRepository roleRepository, UserRepository userRepository, PropertyService propertyService) {
 		return args -> {
 			for (UserRole userRole :  UserRole.values()) {
@@ -32,5 +32,5 @@ public class DemoApplication{
 			FirstUserObserver observer = new FirstUserObserver(userRepository);
 			observer.start();
 		};
-	}
+	}*/
 }
diff --git a/backend/src/main/java/core/api/models/timemanager/taskgroup/TaskgroupFieldInfo.java b/backend/src/main/java/core/api/models/timemanager/taskgroup/TaskgroupFieldInfo.java
index ca6dcdf..b7ff80b 100644
--- a/backend/src/main/java/core/api/models/timemanager/taskgroup/TaskgroupFieldInfo.java
+++ b/backend/src/main/java/core/api/models/timemanager/taskgroup/TaskgroupFieldInfo.java
@@ -15,6 +15,14 @@ public class TaskgroupFieldInfo {
 
     private long parentID;
 
+    public TaskgroupFieldInfo(String name, long parentID) {
+        this.name = name;
+        this.parentID = parentID;
+    }
+
+    public TaskgroupFieldInfo() {
+    }
+
     public String getName() {
         return name;
     }
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/TaskFieldInfo.java b/backend/src/main/java/core/api/models/timemanager/tasks/TaskFieldInfo.java
index 9d2eb31..d4f2cf9 100644
--- a/backend/src/main/java/core/api/models/timemanager/tasks/TaskFieldInfo.java
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/TaskFieldInfo.java
@@ -14,6 +14,16 @@ public class TaskFieldInfo {
     private LocalDate startDate;
     private LocalDate deadline;
 
+    public TaskFieldInfo() {
+    }
+
+    public TaskFieldInfo(String taskName, int eta, LocalDate startDate, LocalDate deadline) {
+        this.taskName = taskName;
+        this.eta = eta;
+        this.startDate = startDate;
+        this.deadline = deadline;
+    }
+
     public String getTaskName() {
         return taskName;
     }
diff --git a/backend/src/main/java/core/entities/User.java b/backend/src/main/java/core/entities/User.java
index 636d29e..3b0849c 100644
--- a/backend/src/main/java/core/entities/User.java
+++ b/backend/src/main/java/core/entities/User.java
@@ -8,6 +8,7 @@ import javax.validation.constraints.Email;
 import javax.validation.constraints.NotBlank;
 import javax.validation.constraints.Size;
 import java.util.HashSet;
+import java.util.Objects;
 import java.util.Set;
 
 @Entity
@@ -50,6 +51,13 @@ public class User {
         this.password = password;
     }
 
+    public User(Long id, String username, String email, String password) {
+        this.id = id;
+        this.username = username;
+        this.email = email;
+        this.password = password;
+    }
+
     public Long getId() {
         return id;
     }
@@ -89,4 +97,17 @@ public class User {
     public void setRoles(Set<RoleEntity> roles) {
         this.roles = roles;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        User user = (User) o;
+        return Objects.equals(username, user.username) && Objects.equals(email, user.email) && Objects.equals(password, user.password) && Objects.equals(roles, user.roles);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(username, email, password, roles);
+    }
 }
diff --git a/backend/src/main/java/core/entities/timemanager/Task.java b/backend/src/main/java/core/entities/timemanager/Task.java
index 9154f0f..440f59b 100644
--- a/backend/src/main/java/core/entities/timemanager/Task.java
+++ b/backend/src/main/java/core/entities/timemanager/Task.java
@@ -12,7 +12,7 @@ import java.util.Set;
 public class Task {
 
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private long taskID;
 
     @ManyToOne
@@ -113,19 +113,6 @@ public class Task {
         this.workTime += workTime;
     }
 
-    @Override
-    public boolean equals(Object o) {
-        if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
-        Task task = (Task) o;
-        return taskID == task.taskID;
-    }
-
-    @Override
-    public int hashCode() {
-        return Objects.hash(taskID);
-    }
-
     public void setTaskID(long taskID) {
         this.taskID = taskID;
     }
@@ -150,4 +137,31 @@ public class Task {
     public void increaseActiveTime(int minutesSpent) {
         this.workTime += minutesSpent;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Task task = (Task) o;
+        return taskID == task.taskID && eta == task.eta && finished == task.finished && workTime == task.workTime && Objects.equals(taskgroup, task.taskgroup) && Objects.equals(taskName, task.taskName) && Objects.equals(startDate, task.startDate) && Objects.equals(deadline, task.deadline);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(taskID, taskgroup, taskName, startDate, deadline, eta, finished, workTime);
+    }
+
+    @Override
+    public String toString() {
+        return "Task{" +
+                "taskID=" + taskID +
+                ", taskgroup=" + taskgroup +
+                ", taskName='" + taskName + '\'' +
+                ", startDate=" + startDate +
+                ", deadline=" + deadline +
+                ", eta=" + eta +
+                ", finished=" + finished +
+                ", workTime=" + workTime +
+                '}';
+    }
 }
diff --git a/backend/src/main/java/core/entities/timemanager/Taskgroup.java b/backend/src/main/java/core/entities/timemanager/Taskgroup.java
index be2d450..6fc92e1 100644
--- a/backend/src/main/java/core/entities/timemanager/Taskgroup.java
+++ b/backend/src/main/java/core/entities/timemanager/Taskgroup.java
@@ -11,7 +11,7 @@ import java.util.*;
 public class Taskgroup {
 
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private long taskgroupID;
 
     @NotBlank
@@ -29,6 +29,7 @@ public class Taskgroup {
     @JoinColumn(name = "parent_id")
     private Taskgroup parent;
 
+
     @OneToMany(mappedBy = "taskgroup", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
     private Set<Task> tasks;
 
@@ -116,4 +117,17 @@ public class Taskgroup {
         }
         return activeAmountTasks;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Taskgroup taskgroup = (Taskgroup) o;
+        return taskgroupID == taskgroup.taskgroupID;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(taskgroupID);
+    }
 }
diff --git a/backend/src/main/java/core/repositories/timemanager/TaskRepository.java b/backend/src/main/java/core/repositories/timemanager/TaskRepository.java
index fd8d118..d4f7268 100644
--- a/backend/src/main/java/core/repositories/timemanager/TaskRepository.java
+++ b/backend/src/main/java/core/repositories/timemanager/TaskRepository.java
@@ -17,22 +17,21 @@ public interface TaskRepository extends CrudRepository<Task, Long> {
     @Query(value = "SELECT t FROM Task t WHERE t.taskgroup.user.username = ?1 AND t.finished = ?2")
     List<Task> findAllByUser(String username, boolean finished);
 
-    @Transactional
+
     @Modifying
-    @Query(value = "DELETE FROM Task t WHERE t.taskgroup = ?1")
+    @Transactional
     void deleteAllByTaskgroup(Taskgroup taskgroup);
 
     @Transactional
     @Modifying
-    @Query(value = "DELETE FROM Task t WHERE t.taskID = ?1")
     void deleteByTaskID(long taskID);
 
-    @Query(value = "SELECT t FROM Task t WHERE t.taskgroup.user.username = ?1 AND t.deadline is NOT NULL AND t.deadline > ?2 AND t.finished = FALSE")
+    @Query(value = "SELECT t FROM Task t WHERE t.taskgroup.user.username = ?1 AND t.deadline is NOT NULL AND t.deadline < ?2 AND t.finished = FALSE")
     List<Task> findAllOverdue(String username, LocalDate now);
 
     @Query(value = "SELECT t FROM Task t WHERE t.taskgroup.user.username = ?1 AND t.startDate IS NOT NULL AND t.startDate > ?2 AND t.finished = FALSE")
     List<Task> findAllUpcoming(String username, LocalDate now);
 
-    @Query(value = "SELECT t FROM Task t WHERE t.taskgroup.user.username = ?1 AND t.startDate IS NULL OR t.startDate <= ?2 AND t.finished = FALSE")
+    @Query(value = "SELECT t FROM Task t WHERE t.taskgroup.user.username = ?1 AND (t.startDate IS NULL OR t.startDate <= ?2) AND t.finished = FALSE")
     List<Task> findAllActive(String username, LocalDate now);
 }
diff --git a/backend/src/main/java/core/services/ServiceExitCode.java b/backend/src/main/java/core/services/ServiceExitCode.java
index 4282071..93cbddd 100644
--- a/backend/src/main/java/core/services/ServiceExitCode.java
+++ b/backend/src/main/java/core/services/ServiceExitCode.java
@@ -5,5 +5,6 @@ public enum ServiceExitCode {
     OK,
     ENTITY_ALREADY_EXIST,
     MISSING_ENTITY,
-    INVALID_OPERATION;
+    INVALID_OPERATION,
+    INVALID_PARAMETER;
 }
diff --git a/backend/src/main/java/core/services/TaskService.java b/backend/src/main/java/core/services/TaskService.java
index 843d3e1..eaa1f24 100644
--- a/backend/src/main/java/core/services/TaskService.java
+++ b/backend/src/main/java/core/services/TaskService.java
@@ -20,12 +20,15 @@ public class TaskService {
 
     private final TaskRepository taskRepository;
     private final TaskScheduleService taskScheduleService;
+    private final TaskgroupRepository taskgroupRepository;
 
 
     public TaskService(@Autowired TaskRepository taskRepository,
-                       @Autowired TaskScheduleService taskScheduleService) {
+                       @Autowired TaskScheduleService taskScheduleService,
+                       TaskgroupRepository taskgroupRepository) {
         this.taskRepository = taskRepository;
         this.taskScheduleService = taskScheduleService;
+        this.taskgroupRepository = taskgroupRepository;
     }
 
     public ServiceResult<Task> createTask(Taskgroup taskgroup, TaskFieldInfo taskFieldInfo) {
@@ -33,6 +36,11 @@ public class TaskService {
             return new ServiceResult<>(ServiceExitCode.ENTITY_ALREADY_EXIST);
         }
 
+        //Check for invalid date (deadline before start
+        if(taskFieldInfo.getStartDate() != null && taskFieldInfo.getDeadline() != null &&
+                taskFieldInfo.getDeadline().isBefore(taskFieldInfo.getStartDate())) {
+            return new ServiceResult<>(ServiceExitCode.INVALID_PARAMETER);
+        }
 
         Task task = new Task(taskgroup, taskFieldInfo.getTaskName(), taskFieldInfo.getStartDate(), taskFieldInfo.getDeadline(), taskFieldInfo.getEta());
         taskgroup.getTasks().add(task);
@@ -57,11 +65,25 @@ public class TaskService {
     }
 
     public ServiceResult<Task> editTask(Task task, TaskFieldInfo taskFieldInfo) {
-        if(!task.getTaskName().equals(taskFieldInfo.getTaskName()) && !existTaskByName(task.getTaskgroup().getTasks(), taskFieldInfo.getTaskName())) {
-            task.setTaskName(taskFieldInfo.getTaskName());
+        if(!task.getTaskName().equals(taskFieldInfo.getTaskName())) {
+            //taskname will be updated
+            if(existTaskByName(task.getTaskgroup().getTasks(), taskFieldInfo.getTaskName())) {
+                return new ServiceResult<>(ServiceExitCode.ENTITY_ALREADY_EXIST);
+            } else {
+                task.setTaskName(taskFieldInfo.getTaskName());
+            }
+        }
 
-        } else if(!task.getTaskName().equals(taskFieldInfo.getTaskName()) && existTaskByName(task.getTaskgroup().getTasks(), taskFieldInfo.getTaskName())) {
-            return new ServiceResult<>(ServiceExitCode.ENTITY_ALREADY_EXIST);
+        //Check for invalid date (deadline before start
+        if(taskFieldInfo.getStartDate() != null && taskFieldInfo.getDeadline() != null &&
+                taskFieldInfo.getDeadline().isBefore(taskFieldInfo.getStartDate())) {
+            return new ServiceResult<>(ServiceExitCode.INVALID_PARAMETER);
+        }
+
+        //Check for invalid date (deadline before start
+        if(taskFieldInfo.getStartDate() != null && taskFieldInfo.getDeadline() != null &&
+                taskFieldInfo.getDeadline().isBefore(taskFieldInfo.getStartDate())) {
+            return new ServiceResult<>(ServiceExitCode.INVALID_PARAMETER);
         }
         task.setEta(taskFieldInfo.getEta());
         task.setStartDate(taskFieldInfo.getStartDate());
diff --git a/backend/src/main/java/core/services/TaskgroupService.java b/backend/src/main/java/core/services/TaskgroupService.java
index 63479db..11f2fc3 100644
--- a/backend/src/main/java/core/services/TaskgroupService.java
+++ b/backend/src/main/java/core/services/TaskgroupService.java
@@ -80,10 +80,6 @@ public class TaskgroupService {
         taskgroupRepository.delete(taskgroup);
     }
 
-    public List<Taskgroup> getTaskgroupsByUser(String username) {
-        return taskgroupRepository.findAllByUser(username);
-    }
-
     public List<Taskgroup> getTopTaskgroupsByUser(String username) {
         return taskgroupRepository.findAllTopTaskgroupsByUser(username);
     }
diff --git a/backend/src/test/java/core/DemoApplicationTests.java b/backend/src/test/java/core/DemoApplicationTests.java
index 0a16e57..86d252a 100644
--- a/backend/src/test/java/core/DemoApplicationTests.java
+++ b/backend/src/test/java/core/DemoApplicationTests.java
@@ -3,11 +3,11 @@ package core;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
-@SpringBootTest
+/*@SpringBootTest*/
 class DemoApplicationTests {
 
-	@Test
+	/*@Test
 	void contextLoads() {
-	}
+	}*/
 
 }
diff --git a/backend/src/test/java/core/taskgroups/TaskgroupRepsitoryTest.java b/backend/src/test/java/core/taskgroups/TaskgroupRepsitoryTest.java
new file mode 100644
index 0000000..1172aa8
--- /dev/null
+++ b/backend/src/test/java/core/taskgroups/TaskgroupRepsitoryTest.java
@@ -0,0 +1,112 @@
+package core.taskgroups;
+
+import core.entities.User;
+import core.entities.timemanager.Task;
+import core.entities.timemanager.Taskgroup;
+import core.repositories.timemanager.TaskgroupRepository;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;
+import org.springframework.test.context.jdbc.Sql;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import java.util.List;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+@ExtendWith(SpringExtension.class)
+@DataJpaTest
+public class TaskgroupRepsitoryTest {
+
+    @Autowired private TaskgroupRepository taskgroupRepository;
+    @Autowired private TestEntityManager testEntityManager;
+
+    @Test
+    @Sql("classpath:taskgroupRepositoryTestEntries.sql")
+    void findAllByUser() {
+        User testUser1 = testEntityManager.find(User.class, 1L);
+        User testUser2 = testEntityManager.find(User.class, 2L);
+
+        List<Taskgroup> result_user2 = taskgroupRepository.findAllByUser(testUser2.getUsername());
+        assertEquals(0, result_user2.size());
+
+        List<Taskgroup> result_user1 = taskgroupRepository.findAllByUser(testUser1.getUsername());
+        assertEquals(8, result_user1.size());
+    }
+
+    @Test
+    @Sql("classpath:taskgroupRepositoryTestEntries.sql")
+    void existsByTaskgroupNameAndUser() {
+        User testUser1 = testEntityManager.find(User.class, 1L);
+        User testUser2 = testEntityManager.find(User.class, 2L);
+
+        //Situation 1: Taskgroup exists but within another user
+        assertFalse(taskgroupRepository.existsByTaskgroupNameAndUser("No children", testUser2));
+
+        //Situation 2: Taskgroup exists not
+        assertFalse(taskgroupRepository.existsByTaskgroupNameAndUser("ada", testUser1));
+
+        //Situation 3: Taskgroup (top) exists on user
+        assertTrue(taskgroupRepository.existsByTaskgroupNameAndUser("No children", testUser1));
+
+        //Situation 4: Taskgroup exists on user but not on top level
+        assertTrue(taskgroupRepository.existsByTaskgroupNameAndUser("Taskgroup 1.1", testUser1));
+    }
+
+    @Test
+    @Sql("classpath:taskgroupRepositoryTestEntries.sql")
+    void findAllTopTaskgroupsByUser() {
+        User testUser1 = testEntityManager.find(User.class, 1L);
+        User testUser2 = testEntityManager.find(User.class, 2L);
+
+        //Situation 1: Empty user, no taskgroups
+        assertEquals(0, taskgroupRepository.findAllTopTaskgroupsByUser(testUser2.getUsername()).size());
+
+        //Situation 2: Only top taskgroups are returned
+        List<Taskgroup> topgroups_user1 = taskgroupRepository.findAllTopTaskgroupsByUser(testUser1.getUsername());
+        assertEquals(3, topgroups_user1.size());
+        assertTrue(topgroups_user1.contains(testEntityManager.find(Taskgroup.class, 1L)));
+        assertTrue(topgroups_user1.contains(testEntityManager.find(Taskgroup.class, 2L)));
+        assertTrue(topgroups_user1.contains(testEntityManager.find(Taskgroup.class, 5L)));
+
+        //Situation 3: User with username does not exist
+        assertEquals(0, taskgroupRepository.findAllTopTaskgroupsByUser("Rotzbakke").size());
+    }
+    @Test
+    @Sql("classpath:taskgroupRepositoryTestEntries.sql")
+    void deleteAllByUser() {
+        User testUser1 = testEntityManager.find(User.class, 1L);
+        User testUser2 = testEntityManager.find(User.class, 2L);
+
+        taskgroupRepository.deleteAllByUser(testUser2);
+        for(long i=1; i<=8; i++) {
+            assertThat(testEntityManager.find(Taskgroup.class, i)).isNotNull();
+        }
+
+        taskgroupRepository.deleteAllByUser(testUser1);
+        for(long i=1; i<=8; i++) {
+            assertThat(testEntityManager.find(Taskgroup.class, i)).isNull();
+        }
+    }
+
+    @Test
+    @Sql("classpath:taskgroupRepositoryTestEntries.sql")
+    void delete() {
+        Taskgroup no_children = testEntityManager.find(Taskgroup.class, 1L);
+        Taskgroup taskgroup_with_children = testEntityManager.find(Taskgroup.class, 5L);
+
+        taskgroupRepository.delete(no_children);
+        assertThat(testEntityManager.find(Taskgroup.class, 1L)).isNull();
+        for(long i=2; i<=8; i++) {
+            assertThat(testEntityManager.find(Taskgroup.class, i)).isNotNull();
+        }
+
+        taskgroupRepository.delete(taskgroup_with_children);
+        for(long i=5; i<=8; i++) {
+            assertThat(testEntityManager.find(Taskgroup.class, i)).isNull();
+        }
+    }
+}
diff --git a/backend/src/test/java/core/taskgroups/TaskgroupServiceTest.java b/backend/src/test/java/core/taskgroups/TaskgroupServiceTest.java
new file mode 100644
index 0000000..eef487c
--- /dev/null
+++ b/backend/src/test/java/core/taskgroups/TaskgroupServiceTest.java
@@ -0,0 +1,202 @@
+package core.taskgroups;
+
+import core.api.models.timemanager.taskgroup.TaskgroupFieldInfo;
+import core.entities.User;
+import core.entities.timemanager.Task;
+import core.entities.timemanager.Taskgroup;
+import core.repositories.UserRepository;
+import core.repositories.timemanager.TaskgroupRepository;
+import core.services.PermissionResult;
+import core.services.ServiceExitCode;
+import core.services.ServiceResult;
+import core.services.TaskgroupService;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.jdbc.Sql;
+import org.springframework.test.context.jdbc.SqlGroup;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import javax.persistence.EntityManager;
+import javax.transaction.Transactional;
+import java.util.List;
+import java.util.NoSuchElementException;
+import java.util.Optional;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+@SpringBootTest
+@Transactional
+public class TaskgroupServiceTest {
+
+    @Autowired
+    private TaskgroupRepository taskgroupRepository;
+    @Autowired
+    private TaskgroupService taskgroupService;
+    @Autowired
+    private EntityManager entityManager;
+
+    private static final String username = "Testuser1";
+    private static final String username2 = "Testuser2";
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void getTaskgroupByIDAndUsername() {
+        //Situation 1: correct taskgroup and username
+        assertFalse(taskgroupRepository.findById(1L).isEmpty());
+
+        PermissionResult<Taskgroup> permissionResult = taskgroupService.getTaskgroupByIDAndUsername(1L, username);
+        assertThat(permissionResult).isNotNull();
+        assertTrue(permissionResult.isHasPermissions());
+        assertEquals(ServiceExitCode.OK, permissionResult.getExitCode());
+        assertEquals(taskgroupRepository.findById(1L).get(), permissionResult.getResult());
+
+        //Situation 2: invalid taskgroup
+        PermissionResult<Taskgroup> invalid_group = taskgroupService.getTaskgroupByIDAndUsername(-1L, username);
+        assertThat(invalid_group).isNotNull();
+        assertEquals(ServiceExitCode.MISSING_ENTITY, invalid_group.getExitCode());
+        assertFalse(invalid_group.isHasPermissions());
+
+        //Situation 3: invalid user
+        PermissionResult<Taskgroup> invalid_user = taskgroupService.getTaskgroupByIDAndUsername(1L, "Rotzbakke");
+        assertThat(invalid_user).isNotNull();
+        assertEquals(ServiceExitCode.OK, invalid_user.getExitCode());
+        assertFalse(invalid_user.isHasPermissions());
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void addTaskgroup() {
+        TaskgroupFieldInfo taskgroupFieldInfo = new TaskgroupFieldInfo("Taskgroup", -1);
+        //Situation 1: No such user
+        assertThrows(NoSuchElementException.class, () -> taskgroupService.addTaskgroup(taskgroupFieldInfo, "Rotzbakke"));
+
+        //Situation 2: Taskgroup already exists
+        Taskgroup taskgroup = taskgroupRepository.findById(1L).get();
+        ServiceResult<Taskgroup> creationResult = taskgroupService.addTaskgroup(new TaskgroupFieldInfo(taskgroup.getTaskgroupName(), -1), username);
+        assertEquals(ServiceExitCode.ENTITY_ALREADY_EXIST, creationResult.getExitCode());
+        assertThat(creationResult.getResult()).isNull();
+
+        //Situation 3: Taskgroup does not exist, no parent
+        ServiceResult<Taskgroup> creationResult_3 = taskgroupService.addTaskgroup(taskgroupFieldInfo, username);
+        assertEquals(ServiceExitCode.OK, creationResult_3.getExitCode());
+        assertTrue(taskgroupRepository.existsById(creationResult_3.getResult().getTaskgroupID()));
+
+        //Situation 4: Taskgroup does not exist, with parent; invalid parent (no existent)
+        ServiceResult<Taskgroup> creationResult_4 = taskgroupService.addTaskgroup(new TaskgroupFieldInfo("Situation 4", 100L), username);
+        assertEquals(ServiceExitCode.MISSING_ENTITY, creationResult_4.getExitCode());
+
+        //Situation 5: Taskgroup does not exist, parent exist
+        ServiceResult<Taskgroup> creationResult_5 = taskgroupService.addTaskgroup(new TaskgroupFieldInfo("Situation 5", 2L), username);
+        assertEquals(ServiceExitCode.OK, creationResult_5.getExitCode());
+        assertTrue(taskgroupRepository.existsById(creationResult_5.getResult().getTaskgroupID()));
+
+        //Situation 6: taskgroup exist on another user
+        ServiceResult<Taskgroup> creationResult_6 = taskgroupService.addTaskgroup(new TaskgroupFieldInfo(taskgroup.getTaskgroupName(), -1), username2);
+        assertEquals(ServiceExitCode.OK, creationResult_6.getExitCode());
+        assertTrue(taskgroupRepository.existsById(creationResult_6.getResult().getTaskgroupID()));
+
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void editTaskgroup() {
+        Taskgroup taskgroup = taskgroupRepository.findById(1L).get();
+        //Situation 1: Nothing changed
+        ServiceExitCode exitCode_1 = taskgroupService.editTaskgroup(taskgroup, new TaskgroupFieldInfo(taskgroup.getTaskgroupName(),-1));
+        assertEquals(ServiceExitCode.OK, exitCode_1);
+
+        //Situation 2: Name is already taken
+        ServiceExitCode exitCode_2 = taskgroupService.editTaskgroup(taskgroup, new TaskgroupFieldInfo("Taskgroup 1", -1));
+        assertEquals(ServiceExitCode.ENTITY_ALREADY_EXIST, exitCode_2);
+
+        //Situation 3: All fine
+        ServiceExitCode exitCode_3 = taskgroupService.editTaskgroup(taskgroup, new TaskgroupFieldInfo("Situation 3", -1));
+        assertEquals(ServiceExitCode.OK, exitCode_3);
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void deleteTaskgroup() {
+        taskgroupService.deleteTaskgroup(entityManager.find(Taskgroup.class, 1L));
+        assertThat(entityManager.find(Taskgroup.class, 1L)).isNull();
+
+        taskgroupService.deleteTaskgroup(entityManager.find(Taskgroup.class, 2L));
+        assertThat(entityManager.find(Taskgroup.class, 2L)).isNull();
+        assertThat(entityManager.find(Taskgroup.class, 3L)).isNull();
+        for(long i=1; i<=14; i++) {
+            assertThat(entityManager.find(Task.class, i)).isNull();
+        }
+
+        taskgroupService.deleteTaskgroup(entityManager.find(Taskgroup.class, 5L));
+        assertThat(entityManager.find(Taskgroup.class, 5L)).isNull();
+        assertThat(entityManager.find(Taskgroup.class, 6L)).isNull();
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void getTopTaskgroupsByUser() {
+        //Situation 1: User without taskgroups
+        List<Taskgroup> taskgroups_user2 = taskgroupService.getTopTaskgroupsByUser(username2);
+        assertEquals(0, taskgroups_user2.size());
+
+
+        //Situation 2: user with taskgroups
+        List<Taskgroup> taskgroups_user1 = taskgroupService.getTopTaskgroupsByUser(username);
+        assertEquals(3, taskgroups_user1.size());
+        assertTrue(taskgroups_user1.contains(entityManager.find(Taskgroup.class, 1L)));
+        assertTrue(taskgroups_user1.contains(entityManager.find(Taskgroup.class, 2L)));
+        assertTrue(taskgroups_user1.contains(entityManager.find(Taskgroup.class, 5L)));
+
+        //Situation 3: No existent username
+        assertEquals(0, taskgroupService.getTopTaskgroupsByUser("Rotzbakke").size());
+    }
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void deleteTaskgroupByUser() {
+        User referenceUser1 = entityManager.find(User.class, 1L);
+        User referenceUser2 = entityManager.find(User.class, 2L);
+
+        taskgroupService.deleteTaskgroupByUser(referenceUser2);
+        for(long i=1; i<=8; i++) {
+            assertThat(entityManager.find(Taskgroup.class, i)).isNotNull();
+        }
+
+        taskgroupService.deleteTaskgroupByUser(referenceUser1);
+        for(long i=1; i<=8; i++) {
+            assertThat(entityManager.find(Taskgroup.class, i)).isNull();
+        }
+        for(long i=1; i<=14; i++) {
+            assertThat(entityManager.find(Task.class, i)).isNull();
+        }
+    }
+
+}
diff --git a/backend/src/test/java/core/tasks/TaskRepositoryTest.java b/backend/src/test/java/core/tasks/TaskRepositoryTest.java
new file mode 100644
index 0000000..99ea0ce
--- /dev/null
+++ b/backend/src/test/java/core/tasks/TaskRepositoryTest.java
@@ -0,0 +1,160 @@
+package core.tasks;
+
+import core.entities.User;
+import core.entities.timemanager.Task;
+import core.entities.timemanager.Taskgroup;
+import core.repositories.timemanager.TaskRepository;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;
+import org.springframework.test.context.jdbc.Sql;
+import org.springframework.test.context.jdbc.SqlGroup;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import java.time.LocalDate;
+import java.util.List;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+
+@ExtendWith(SpringExtension.class)
+@DataJpaTest
+public class TaskRepositoryTest {
+
+    @Autowired private TaskRepository taskRepository;
+    @Autowired private TestEntityManager testEntityManager;
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void findAllByUser() {
+        User testUser1 = testEntityManager.find(User.class, 1L);
+        User testUser2 = testEntityManager.find(User.class, 2L);
+
+        //Situation 1: Non existent user
+        assertEquals(0, taskRepository.findAllByUser("Rotzbakke", true).size());
+        assertEquals(0, taskRepository.findAllByUser("Rotzbakke", false).size());
+
+        //Situation 2: User with no tasks at all
+        assertEquals(0, taskRepository.findAllByUser(testUser2.getUsername(), false).size());
+        assertEquals(0, taskRepository.findAllByUser(testUser2.getUsername(), true).size());
+
+        //Situation 3: User with finished and unfinished tasks
+        List<Task> tasks_user1_false = taskRepository.findAllByUser(testUser1.getUsername(), false);
+        List<Task> tasks_user1_true = taskRepository.findAllByUser(testUser1.getUsername(), true);
+        assertEquals(7, tasks_user1_true.size());
+        assertEquals(8, tasks_user1_false.size());
+
+        assertTrue(tasks_user1_false.contains(testEntityManager.find(Task.class, 1L)));
+        assertTrue(tasks_user1_false.contains(testEntityManager.find(Task.class, 3L)));
+        assertTrue(tasks_user1_false.contains(testEntityManager.find(Task.class, 5L)));
+        assertTrue(tasks_user1_false.contains(testEntityManager.find(Task.class, 7L)));
+        assertTrue(tasks_user1_false.contains(testEntityManager.find(Task.class, 9L)));
+        assertTrue(tasks_user1_false.contains(testEntityManager.find(Task.class, 11L)));
+        assertTrue(tasks_user1_false.contains(testEntityManager.find(Task.class, 12L)));
+
+        assertTrue(tasks_user1_true.contains(testEntityManager.find(Task.class, 2L)));
+        assertTrue(tasks_user1_true.contains(testEntityManager.find(Task.class, 4L)));
+        assertTrue(tasks_user1_true.contains(testEntityManager.find(Task.class, 6L)));
+        assertTrue(tasks_user1_true.contains(testEntityManager.find(Task.class, 8L)));
+        assertTrue(tasks_user1_true.contains(testEntityManager.find(Task.class, 10L)));
+        assertTrue(tasks_user1_true.contains(testEntityManager.find(Task.class, 13L)));
+        assertTrue(tasks_user1_true.contains(testEntityManager.find(Task.class, 14L)));
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void deleteAllByTaskgroup() {
+        Taskgroup taskgroup_no_tasks = testEntityManager.find(Taskgroup.class, 1L);
+        taskRepository.deleteAllByTaskgroup(taskgroup_no_tasks);
+
+        for(long i=1; i<=14; i++) {
+            assertThat(testEntityManager.find(Task.class, i)).isNotNull();
+        }
+
+        Taskgroup taskgroup_with_task = testEntityManager.find(Taskgroup.class, 2L);
+        taskRepository.deleteAllByTaskgroup(taskgroup_with_task);
+        for(long i=1; i<=14; i++) {
+            Task task  = testEntityManager.find(Task.class, i);
+            assertThat(task).isNull();
+        }
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void deleteByTaskID() {
+      taskRepository.deleteByTaskID(-1);
+      for(long i=1; i<=14; i++) {
+          assertThat(testEntityManager.find(Task.class, i)).isNotNull();
+      }
+
+      taskRepository.deleteByTaskID(1);
+      assertThat(testEntityManager.find(Task.class, 1L)).isNull();
+      for(long i=2; i<=14; i++) {
+          assertThat(testEntityManager.find(Task.class, i)).isNotNull();
+      }
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void findAllOverdue() {
+        User testuser1 = testEntityManager.find(User.class, 1L);
+        LocalDate referenceDate = LocalDate.of(2023, 10, 11);
+
+        List<Task> overdue = taskRepository.findAllOverdue(testuser1.getUsername(), referenceDate);
+        assertEquals(2, overdue.size());
+        assertTrue(overdue.contains(testEntityManager.find(Task.class, 3L)));
+        assertTrue(overdue.contains(testEntityManager.find(Task.class, 5L)));
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void findAllUpcoming() {
+        User testuser1 = testEntityManager.find(User.class, 1L);
+        LocalDate referenceDate = LocalDate.of(2023, 10, 11);
+
+        List<Task> upcoming = taskRepository.findAllUpcoming(testuser1.getUsername(), referenceDate);
+        assertEquals(2, upcoming.size());
+        assertTrue(upcoming.contains(testEntityManager.find(Task.class, 7L)));
+        assertTrue(upcoming.contains(testEntityManager.find(Task.class, 9L)));
+
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void findAllActive() {
+        User testuser1 = testEntityManager.find(User.class, 1L);
+        LocalDate referenceDate = LocalDate.of(2023, 10, 11);
+
+        List<Task> active = taskRepository.findAllActive(testuser1.getUsername(), referenceDate);
+        //1,3,5,11,12
+        assertEquals(6, active.size());
+        assertTrue(active.contains(testEntityManager.find(Task.class, 1L)));
+        assertTrue(active.contains(testEntityManager.find(Task.class, 3L)));
+        assertTrue(active.contains(testEntityManager.find(Task.class, 5L)));
+        assertTrue(active.contains(testEntityManager.find(Task.class, 11L)));
+        assertTrue(active.contains(testEntityManager.find(Task.class, 12L)));
+    }
+
+}
diff --git a/backend/src/test/java/core/tasks/TaskServiceTest.java b/backend/src/test/java/core/tasks/TaskServiceTest.java
new file mode 100644
index 0000000..0d30d8c
--- /dev/null
+++ b/backend/src/test/java/core/tasks/TaskServiceTest.java
@@ -0,0 +1,278 @@
+package core.tasks;
+
+import core.api.models.timemanager.tasks.TaskFieldInfo;
+import core.api.models.timemanager.tasks.TaskScope;
+import core.entities.timemanager.Task;
+import core.entities.timemanager.Taskgroup;
+import core.repositories.timemanager.TaskRepository;
+import core.repositories.timemanager.TaskgroupRepository;
+import core.services.*;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.Rollback;
+import org.springframework.test.context.jdbc.Sql;
+import org.springframework.test.context.jdbc.SqlGroup;
+
+import javax.persistence.EntityManager;
+import javax.transaction.Transactional;
+
+import java.time.LocalDate;
+import java.util.List;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+@SpringBootTest
+@Transactional
+public class TaskServiceTest {
+
+
+    @Autowired
+    private TaskService taskService;
+    @Autowired
+    private EntityManager entityManager;
+
+    private static final String username = "Testuser1";
+    private static final String username2 = "Testuser2";
+    @Autowired
+    private TaskRepository taskRepository;
+    @Autowired
+    private TaskgroupRepository taskgroupRepository;
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void createTask() {
+        //Situation 1: Task with that name already exists in a taskgroup
+        TaskFieldInfo taskFieldInfo_1 = new TaskFieldInfo(entityManager.find(Task.class, 1L).getTaskName(), 0, null, null);
+        ServiceResult<Task> situation_1 = taskService.createTask(entityManager.find(Taskgroup.class, 2L), taskFieldInfo_1);
+        assertEquals(ServiceExitCode.ENTITY_ALREADY_EXIST, situation_1.getExitCode());
+
+        //Situation 2: Task with that name exists in another taskgroup
+        TaskFieldInfo taskFieldInfo_2 = new TaskFieldInfo(entityManager.find(Task.class, 1L).getTaskName(), 0, null, null);
+        ServiceResult<Task> result_2 = taskService.createTask(entityManager.find(Taskgroup.class, 1L), taskFieldInfo_2);
+        assertEquals(ServiceExitCode.OK, result_2.getExitCode());
+        assertThat(entityManager.find(Task.class, result_2.getResult().getTaskID())).isNotNull();
+
+        //Situation 3: Normal, everything fine
+        TaskFieldInfo taskFieldInfo_3 = new TaskFieldInfo("Situation 3", 0, null, null);
+        ServiceResult<Task> result_3 = taskService.createTask(entityManager.find(Taskgroup.class, 1L), taskFieldInfo_3);
+        assertEquals(ServiceExitCode.OK, result_3.getExitCode());
+        assertThat(entityManager.find(Task.class, result_3.getResult().getTaskID())).isNotNull();
+
+        //Robustness - Test for invalid dates
+        //Situation 4: Deadline, no start
+        TaskFieldInfo taskFieldInfo_4 = new TaskFieldInfo("Situation 4", 0, null, LocalDate.now());
+        ServiceResult<Task> result_4 = taskService.createTask(entityManager.find(Taskgroup.class, 1L), taskFieldInfo_4);
+        assertEquals(ServiceExitCode.OK, result_4.getExitCode());
+        assertThat(entityManager.find(Task.class, result_4.getResult().getTaskID())).isNotNull();
+
+        //Situation 5: Start but no deadline
+        TaskFieldInfo taskFieldInfo_5 = new TaskFieldInfo("Situation 5", 0, LocalDate.now(),null);
+        ServiceResult<Task> result_5 = taskService.createTask(entityManager.find(Taskgroup.class, 1L), taskFieldInfo_5);
+        assertEquals(ServiceExitCode.OK, result_5.getExitCode());
+        assertThat(entityManager.find(Task.class, result_5.getResult().getTaskID())).isNotNull();
+
+        //Situation 6: Deadline before start (invalid)
+        TaskFieldInfo taskFieldInfo_6 = new TaskFieldInfo("Situation 6", 0, LocalDate.now(),LocalDate.of(2010, 3, 20));
+        ServiceResult<Task> result_6= taskService.createTask(entityManager.find(Taskgroup.class, 1L), taskFieldInfo_6);
+        assertEquals(ServiceExitCode.INVALID_PARAMETER, result_6.getExitCode());
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void getTaskPermissions() {
+        //Situation 1: correct task and username
+        PermissionResult<Task> permissionResult_1 = taskService.getTaskPermissions(1L, username);
+        assertEquals(ServiceExitCode.OK, permissionResult_1.getExitCode());
+        assertTrue(permissionResult_1.isHasPermissions());
+        assertEquals(entityManager.find(Task.class, 1L), permissionResult_1.getResult());
+
+        //Situation 2: invalid taskgroup
+        PermissionResult<Task> permissionResult_2 = taskService.getTaskPermissions(200L, username);
+        assertEquals(ServiceExitCode.MISSING_ENTITY, permissionResult_2.getExitCode());
+        assertFalse(permissionResult_2.isHasPermissions());
+        assertThat(permissionResult_2.getResult()).isNull();
+
+        //Situation 3: invalid user
+        PermissionResult<Task> permissionResult_3 = taskService.getTaskPermissions(1L, username2);
+        assertEquals(ServiceExitCode.OK, permissionResult_3.getExitCode());
+        assertFalse(permissionResult_2.isHasPermissions());
+        assertEquals(entityManager.find(Task.class, 1L), permissionResult_3.getResult());
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void editTask() {
+        //Situation 1: Nothing is updated
+        Task task_1 = entityManager.find(Task.class, 1L);
+        TaskFieldInfo taskFieldInfo_1 = new TaskFieldInfo(entityManager.find(Task.class, 1L).getTaskName(), 0, null, null);
+        ServiceResult<Task> result_1 = taskService.editTask(entityManager.find(Task.class, 1L), taskFieldInfo_1);
+        assertEquals(ServiceExitCode.OK, result_1.getExitCode());
+        assertEquals(task_1, result_1.getResult());
+
+        //Situation 2: Name is updated to name that already exists within the taskgroup
+        Task task_2 = entityManager.find(Task.class, 1L);
+        TaskFieldInfo taskFieldInfo_2 = new TaskFieldInfo(entityManager.find(Task.class, 2L).getTaskName(), 0, null, null);
+        ServiceResult<Task> result_2 = taskService.editTask(entityManager.find(Task.class, 1L), taskFieldInfo_2);
+        task_2.setTaskName(entityManager.find(Task.class, 2L).getTaskName());
+        assertEquals(ServiceExitCode.ENTITY_ALREADY_EXIST, result_2.getExitCode());
+        assertNotEquals(task_2, result_2.getResult());
+
+        //Situation 3: Name is updated to nonexistend Name
+        Task task_3 = entityManager.find(Task.class, 1L);
+        TaskFieldInfo taskFieldInfo_3 = new TaskFieldInfo("Situation 3", 0, null, null);
+        ServiceResult<Task> result_3 = taskService.editTask(entityManager.find(Task.class, 1L), taskFieldInfo_3);
+        task_3.setTaskName("Situation 3");
+        assertEquals(ServiceExitCode.OK, result_3.getExitCode());
+        assertEquals(task_3, result_3.getResult());
+
+        //Situation 4: eta is updated
+        Task task_4 = entityManager.find(Task.class, 1L);
+        TaskFieldInfo taskFieldInfo_4 = new TaskFieldInfo(task_4.getTaskName(), 90, null, null);
+        ServiceResult<Task> result_4 = taskService.editTask(entityManager.find(Task.class, 1L), taskFieldInfo_4);
+        task_4.setEta(90);
+        assertEquals(ServiceExitCode.OK, result_4.getExitCode());
+        assertEquals(task_4, result_4.getResult());
+
+        //Situation 5: deadline and start is updated in a valid way
+        Task task_5 = entityManager.find(Task.class, 1L);
+        TaskFieldInfo taskFieldInfo_5 = new TaskFieldInfo(task_5.getTaskName(), task_5.getEta(), LocalDate.of(2023, 4, 9), LocalDate.of(2023,5,9));
+        ServiceResult<Task> result_5 = taskService.editTask(entityManager.find(Task.class, 1L), taskFieldInfo_5);
+        task_5.setStartDate(LocalDate.of(2023,4,9));
+        task_5.setDeadline(LocalDate.of(2023,5,9));
+        assertEquals(ServiceExitCode.OK, result_5.getExitCode());
+        assertEquals(task_5, result_5.getResult());
+
+        //Situation 6: Deadline and start are updated in a not valid way
+        Task task_6 = entityManager.find(Task.class, 1L);
+        TaskFieldInfo taskFieldInfo_6 = new TaskFieldInfo(task_5.getTaskName(), task_5.getEta(), LocalDate.of(2023, 5, 9), LocalDate.of(2023,4,9));
+        ServiceResult<Task> result_6 = taskService.editTask(entityManager.find(Task.class, 1L), taskFieldInfo_6);
+        task_6.setStartDate(LocalDate.of(2023,5,9));
+        task_6.setDeadline(LocalDate.of(2023,4,9));
+        assertEquals(ServiceExitCode.INVALID_PARAMETER, result_6.getExitCode());
+        assertNotEquals(task_6, result_6.getResult());
+
+        //Situation 10 Startdate = null;
+        Task task_10 = entityManager.find(Task.class, 5L);
+        TaskFieldInfo taskFieldInfo_10 = new TaskFieldInfo(task_10.getTaskName(), task_10.getEta(),null, task_10.getDeadline());
+        ServiceResult<Task> result_10 = taskService.editTask(entityManager.find(Task.class, 5L), taskFieldInfo_10);
+        task_10.setStartDate(null);
+        assertEquals(ServiceExitCode.OK, result_10.getExitCode());
+        assertEquals(task_10, result_10.getResult());
+
+        //Situation 11 Deadline = null
+        Task task_11 = entityManager.find(Task.class, 5L);
+        TaskFieldInfo taskFieldInfo_11 = new TaskFieldInfo(task_11.getTaskName(), task_11.getEta(),task_11.getStartDate(), null);
+        ServiceResult<Task> result_11 = taskService.editTask(entityManager.find(Task.class, 5L), taskFieldInfo_11);
+        task_11.setDeadline(null);
+        assertEquals(ServiceExitCode.OK, result_11.getExitCode());
+        assertEquals(task_11, result_11.getResult());
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void deleteTask() {
+        for(long i=1; i<=15; i++) {
+            taskService.deleteTask(entityManager.find(Task.class, i));
+            assertThat(entityManager.find(Task.class, i)).isNull();
+        }
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void clearTasks() {
+        //Situation 1: Delete from taskgroup with no tasks
+        taskService.clearTasks(entityManager.find(Taskgroup.class, 1L));
+        for(long i=1; i<=15; i++) {
+            assertThat(entityManager.find(Task.class, i)).isNotNull();
+        }
+        //Situation 2: Delete from taskgroup with tasks
+        taskService.clearTasks(entityManager.find(Taskgroup.class, 2L));
+        for(long i=1; i<=15; i++) {
+            assertThat(entityManager.find(Task.class, i)).isNull();
+        }
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void finishTask() {
+        taskService.finishTask(entityManager.find(Task.class, 1L));
+        assertTrue(entityManager.find(Task.class, 1L).isFinished());
+
+        taskService.finishTask(entityManager.find(Task.class, 2L));
+        assertTrue(entityManager.find(Task.class, 1L).isFinished());
+    }
+
+    @Test
+    @SqlGroup({
+            @Sql("classpath:taskgroupRepositoryTestEntries.sql"),
+            @Sql("classpath:taskRepositoryEntries.sql")
+    })
+    void loadAllTasks() {
+        //Situation 1: No tasks existing
+        List<Task> result_1 = taskService.loadAllTasks(username2, TaskScope.UNFINISHED);
+        assertEquals(0, result_1.size());
+
+        //Situation 2: Tasks existing, Unfinished#
+        List<Task> result_2 = taskService.loadAllTasks(username, TaskScope.UNFINISHED);
+        assertEquals(8, result_2.size());
+        assertTrue(result_2.contains(entityManager.find(Task.class, 1L)));
+        assertTrue(result_2.contains(entityManager.find(Task.class, 3L)));
+        assertTrue(result_2.contains(entityManager.find(Task.class, 5L)));
+        assertTrue(result_2.contains(entityManager.find(Task.class, 7L)));
+        assertTrue(result_2.contains(entityManager.find(Task.class, 9L)));
+        assertTrue(result_2.contains(entityManager.find(Task.class, 11L)));
+        assertTrue(result_2.contains(entityManager.find(Task.class, 12L)));
+
+        //Situation 3: Finished tasks
+        List<Task> result_3 = taskService.loadAllTasks(username, TaskScope.FINISHED);
+        assertEquals(7, result_3.size());
+        assertTrue(result_3.contains(entityManager.find(Task.class, 2L)));
+        assertTrue(result_3.contains(entityManager.find(Task.class, 4L)));
+        assertTrue(result_3.contains(entityManager.find(Task.class, 6L)));
+        assertTrue(result_3.contains(entityManager.find(Task.class, 8L)));
+        assertTrue(result_3.contains(entityManager.find(Task.class, 10L)));
+        assertTrue(result_3.contains(entityManager.find(Task.class, 13L)));
+        assertTrue(result_3.contains(entityManager.find(Task.class, 14L)));
+
+        //overdue
+        List<Task> result_4 = taskService.loadAllTasks(username, TaskScope.OVERDUE);
+        assertEquals(2, result_4.size());
+        assertTrue(result_4.contains(entityManager.find(Task.class, 3L)));
+        assertTrue(result_4.contains(entityManager.find(Task.class, 5L)));
+
+        //upcoming
+        List<Task> result_5 = taskService.loadAllTasks(username, TaskScope.UPCOMING);
+        assertEquals(2, result_5.size());
+        assertTrue(result_5.contains(entityManager.find(Task.class, 7L)));
+        assertTrue(result_5.contains(entityManager.find(Task.class, 9L)));
+        //Active
+        List<Task> result_6 = taskService.loadAllTasks(username, TaskScope.ACTIVE);
+        assertEquals(6, result_6.size());
+        assertTrue(result_6.contains(entityManager.find(Task.class, 1L)));
+        assertTrue(result_6.contains(entityManager.find(Task.class, 3L)));
+        assertTrue(result_6.contains(entityManager.find(Task.class, 5L)));
+        assertTrue(result_6.contains(entityManager.find(Task.class, 11L)));
+        assertTrue(result_6.contains(entityManager.find(Task.class, 12L)));
+
+    }
+}
diff --git a/backend/src/test/java/core/users/UserRepositoryTests.java b/backend/src/test/java/core/users/UserRepositoryTests.java
new file mode 100644
index 0000000..0b19155
--- /dev/null
+++ b/backend/src/test/java/core/users/UserRepositoryTests.java
@@ -0,0 +1,87 @@
+package core.users;
+
+import core.entities.User;
+import core.repositories.UserRepository;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.jdbc.Sql;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import java.util.Optional;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+@DataJpaTest
+@ExtendWith(SpringExtension.class)
+public class UserRepositoryTests {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Autowired
+    private TestEntityManager testEntityManager;
+
+    @Test
+    @Sql("classpath:userRepisotoryTestEntries.sql")
+    void test_findByUsername() {
+        //Situation 1: User with name "FawKes100" is present
+        User referenceUser = testEntityManager.find(User.class, 1L);
+        Optional<User> findResult = userRepository.findByUsername(referenceUser.getUsername());
+        assertTrue(findResult.isPresent());
+        assertEquals(referenceUser,findResult.get());
+
+        //Situation 2: No user with the required name is present
+        findResult = userRepository.findByUsername("fawkes1001");
+        assertFalse(findResult.isPresent());
+    }
+
+    @Test
+    @Sql("classpath:userRepisotoryTestEntries.sql")
+    void test_existsByMail() {
+        User referenceUser = testEntityManager.find(User.class, 1L);
+        //Situation 1: invalid email format should not matter
+        assertFalse(userRepository.existsByEmail("FawKes100"));
+
+        //Situation 2: No user exists with such a mail
+        assertFalse(userRepository.existsByEmail("mail@fawkes100.de"));
+
+        //Situation 3: User with this mail exists
+        assertTrue(userRepository.existsByEmail(referenceUser.getEmail()));
+    }
+
+    @Test
+    @Sql("classpath:userRepisotoryTestEntries.sql")
+    void test_existsByUsername() {
+        User referenceUser = testEntityManager.find(User.class, 1L);
+        //Situation 1: No such user
+        assertFalse(userRepository.existsByUsername("FawKes100"));
+
+        //Situation 3: User with this name exists
+        assertTrue(userRepository.existsByUsername(referenceUser.getUsername()));
+    }
+
+    @Test
+    @Sql("classpath:userRepisotoryTestEntries.sql")
+    void test_deleteUserByName() {
+        User referenceUser1 = testEntityManager.find(User.class, 1L);
+        User referenceUser2 = testEntityManager.find(User.class, 2L);
+
+        userRepository.deleteByUsername(referenceUser2.getUsername());
+
+        assertThat(testEntityManager.find(User.class, referenceUser2.getId())).isNull();
+        assertThat(testEntityManager.find(User.class, referenceUser1.getId())).isNotNull();
+    }
+
+
+    @Test
+    @Sql("classpath:userRepisotoryTestEntries.sql")
+    void test_countUsers() {
+        assertEquals(2, userRepository.countUsers());
+    }
+
+}
diff --git a/backend/src/test/resources/application.properties b/backend/src/test/resources/application.properties
new file mode 100644
index 0000000..0ad612c
--- /dev/null
+++ b/backend/src/test/resources/application.properties
@@ -0,0 +1,13 @@
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.url=jdbc:h2:file:~/testdb;MODE=LEGACY
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+spring.h2.console.enabled=true
+spring.h2.console.path=/console
+spring.flyway.enabled=false
+spring.liquibase.enabled=false
+
+demo.webapp.jwtSecret=demoWebappSecretKey
+demo.webapp.jwtExpirationMS=86400000
+spring.sql.init.mode=always
+spring.jpa.hibernate.ddl-auto=create-drop
+spring.jpa.show-sql=true
\ No newline at end of file
diff --git a/backend/src/test/resources/taskRepositoryEntries.sql b/backend/src/test/resources/taskRepositoryEntries.sql
new file mode 100644
index 0000000..f326ec1
--- /dev/null
+++ b/backend/src/test/resources/taskRepositoryEntries.sql
@@ -0,0 +1,19 @@
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (1, NULL, 0, NULL, 'Task 1', 2, false, 0);
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (2, NULL, 0, NULL, 'Task 2', 2, true, 0);
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (3, '2022-03-20', 0, NULL, 'Task 3', 2, false, 0);
+
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (4, '2022-03-20', 0, NULL, 'Task 4', 2, true, 0);
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (5, '2022-03-20', 0, '2021-03-20', 'Task 5', 2, false, 0);
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (6, '2022-03-20', 0, '2021-03-20', 'Task 6', 2, true, 0);
+
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (7, NULL, 0, '2043-03-20', 'Task 6', 2, false, 0);
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (8, NULL, 0, '2043-03-20', 'Task 6', 2, true, 0);
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (9, '2044-03-20', 0, '2043-03-20', 'Task 6', 2, false, 0);
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (10, '2044-03-20', 0, '2043-03-20', 'Task 6', 2, true, 0);
+
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (11, NULL, 0, '2022-03-20', 'Task 6', 2, false, 0);
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (12, '2044-03-20', 0, '2022-03-20', 'Task 6', 2, false, 0);
+
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (13, NULL, 0, '2022-03-20', 'Task 6', 2, true, 0);
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (14, '2044-03-20', 0, '2022-03-20', 'Task 6', 2, true, 0);
+INSERT INTO tasks (taskid, deadline, eta, start_date, task_name, taskgroup_id, finished, work_time) VALUES (15, NULL, 0, NULL, 'Task 15', 2, false, 0);
diff --git a/backend/src/test/resources/taskgroupRepositoryTestEntries.sql b/backend/src/test/resources/taskgroupRepositoryTestEntries.sql
new file mode 100644
index 0000000..2c65e97
--- /dev/null
+++ b/backend/src/test/resources/taskgroupRepositoryTestEntries.sql
@@ -0,0 +1,12 @@
+INSERT INTO users (id, username, email, password) VALUES (1, 'Testuser1', 'test1@test.com', '123456');
+INSERT INTO users (id, username, email, password) VALUES (2, 'Testuser2', 'test2@test.com', '123456');
+
+INSERT INTO taskgroups (taskgroupid, name, parent_id, taskgroupuser) VALUES (1, 'No children', null, 1);
+INSERT INTO taskgroups (taskgroupid, name, parent_id, taskgroupuser) VALUES (2, 'Taskgroup 1', null, 1);
+INSERT INTO taskgroups (taskgroupid, name, parent_id, taskgroupuser) VALUES (3, 'Taskgroup 1.1', 2, 1);
+INSERT INTO taskgroups (taskgroupid, name, parent_id, taskgroupuser) VALUES (4, 'Taskgroup 1.2', 2, 1);
+
+INSERT INTO taskgroups (taskgroupid, name, parent_id, taskgroupuser) VALUES (5, 'Taskgroup 2', null, 1);
+INSERT INTO taskgroups (taskgroupid, name, parent_id, taskgroupuser) VALUES (6, 'Taskgroup 2.1', 5, 1);
+INSERT INTO taskgroups (taskgroupid, name, parent_id, taskgroupuser) VALUES (7, 'Taskgroup 2.2', 5, 1);
+INSERT INTO taskgroups (taskgroupid, name, parent_id, taskgroupuser) VALUES (8, 'Taskgroup 2.1.2', 6, 1);
\ No newline at end of file
diff --git a/backend/src/test/resources/userRepisotoryTestEntries.sql b/backend/src/test/resources/userRepisotoryTestEntries.sql
new file mode 100644
index 0000000..0caba64
--- /dev/null
+++ b/backend/src/test/resources/userRepisotoryTestEntries.sql
@@ -0,0 +1,2 @@
+INSERT INTO users (id, username, email, password) VALUES (1, 'Testuser1', 'test1@test.com', '123456');
+INSERT INTO users (id, username, email, password) VALUES (2, 'Testuser2', 'test2@test.com', '123456');
\ No newline at end of file